Homasote absorbs much of the sound that gets through the carpet padding.
Carpet noise fastrack.
In most cases you need to use an underlayment specifically designed for noise reduction between the carpet and the standard pad.
One trick with fastrack is carpet with a medium high nap it fills the echo chamber base and really cuts down the noise.
Finally rather than putting fastrack right on top of a wooden table put a layer of homasote in between the track and the table.
I ve run fastrack on carpeting and it s queiter but to me carpet still lets the sound to escape from under the track.
50 to 65 percent reduction of noise.
Even after doing these things fastrack tends to be a bit louder than traditional track but it makes the noise tolerable.